html, body {
    height: 100%;
}

body {
    background-color: #eee;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login {
    width: 550px;
    height: 400px;
    background-color: #fff;
    border-radius: 10px;
    overflow: hidden;
}

.login-logo {
    height: 120px;
    background: url("login-logo.jpg") no-repeat center center/cover;
    position: relative;
    margin-bottom: 30px;
}

.login-logo::after {
    content: "";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
}

.login form {
    margin: 8px 20px;
}

.login form > div {
    margin-bottom: 6px;
}

.login form input {
    outline: none;
    border: 1px solid #ccc;
    padding: 10px 0 10px 6px;
    width: 290px;
}

#captcha {
    width: 160px;
}

.login form > div > label:first-child {
    display: inline-block;
    width: 100px;
    text-align: right;
}

#login-btn {
    outline: none;
    background-color: #1e9fff;
    border-color: transparent;
    padding: 10px 50px;
    color: #fff;
}